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Problem-Solving Skills in Managing Hypoglycemia Among Older Adults With Diabetes Mellitus
No full textDynamics of electricity price volatility and its impacts on energy investments
No full textThis study examines the price volatility dynamics of Turkiye's day-ahead electricity market from 2018 to 2024, analyzing price variations across moderate, high, and extreme regimes. The Markov Regime-Switching GJR-GARCH model captures sudden regime shifts, proving that the three-regime model outperforms the single-regime model based on Value-at-Risk calculations. Regime 1 (moderate) accounts for 42 % of observations in Turkiye's electricity market, and Regimes 2 (high) and 3 (extreme) comprise 45 % and 13 %, respectively. Transition probabilities indicate that electricity prices tend to stay in more volatile regimes, especially during crucial shocks like the Russia-Ukraine conflict and the COVID-19 pandemic. A linear model is also constructed to assess the impact of different energy sources-solar, wind, hydropower, and natural gas-on price volatility. Results show that solar power reduces volatility in extreme conditions, wind and hydropower can either stabilize or amplify volatility, and natural gas is a key driver of volatility in all regimes. Renewable energy investments increase short-term price volatility due to the Merit Order Effect, but in the long run, they enhance energy security by reducing fossil fuel dependence. This study suggests strategies ranging from risk management techniques to energy policies to strengthen electricity market resilience against sudden price shifts
The Importance of Pan-Immune Inflammation Value (PIV) in Predicting Coronary Collateral Circulation in Stable Coronary Artery Patients
No full textIn this study, the correlation between pan-immune-inflammation value (PIV) and coronary collateral circulation (CCC) in patients with chronic coronary syndrome (CCS) was analyzed. The study included 663 patients with CCS who underwent coronary angiography and had coronary stenosis of >= 95% in at least one major coronary vessel. The participants were divided into two groups: good CCC (Rentrop score 2-3) and poor CCC (Rentrop score 0-1). PIV score was calculated as monocyte x platelet x neutrophil/lymphocyte count. When the patient groups who developed good and poor CCC were compared, neutrophil/lymphocyte ratio (NLR) (P < .001), C-reactive protein (CRP) levels, CRP/albumin ratio (CAR) (P < .001), systemic immune-inflammation index (SII) (P < .001), and PIV (P < .001) were higher in patients with poor CCC. In multivariate logistic regression analysis, age, SII, NLR, CRP, CAR, and PIV were found to be independent predictors of poor CCC (P < .001, for all). Receiver operating characteristic (ROC) analysis demonstrated that a cut-off value of 442.2 for PIV predicted poor CCC slightly better compared to other markers, with 76.8% sensitivity and 70.1% specificity (area under ROC curve = 0.808 (95% CI: 0.764-0.851), P < .001). These findings suggest that PIV can be used as an independent predictor of CCC development
Testing the Validity of Efficiency Wage Models in Türkiye: An ARDL and Tado-Yamamoto Approach
No full textIn the economic literature, the analysis of the relationship between real wages and productivity has been based on two approaches to the causality between variables. Orthodox economics sees productivity as the cause of wages. In contrast, inefficient wage theories (such as the Solow Model, Nutrition Model, Shapiro and Stiglitz) suggest that wages affect productivity. This study aims to determine which theory is valid for Türkiye with quarterly data for the period 2009Q1-2023Q4. It seeks to contribute to the implementation of appropriate policies for Türkiye by accurately establishing the relationship between these variables. Furthermore, using the ARDL and Toda-Yamamoto methods, the study aims to contribute to the literature. The findings obtained with the ARDL method indicate that an increase in real wages leads to increased productivity, confirming the efficient wage theories. Furthermore, the study reveals that while the increase in employment contributes to productivity, the increase in working hours has a negative effect on productivity. There is a one-way causality between real wages, employment, working hours and productivity according to the Toda-Yamamoto analysis. According to the study’s findings, efficient wage models are valid in Türkiye
A Rankine-Kalina combined cycle hybrid system integrated with low-temperature geothermal and solar energy for sustainable hydrogen production: Comprehensive 9E analysis
No full textA new hybrid system model is proposed in which solar energy is integrated into low-temperature geothermal resources, which possess significant global potential but face challenges when directly utilized for energy production. In the proposed system, the low-temperature geothermal resource is used to preheat the thermal oil circulating in the parabolic trough solar collector. This approach allows the geothermal source to contribute to energy production and ensures system continuity during periods of insufficient solar radiation. The proposed hybrid system consists of a combined thermodynamic cycle in which the Rankine and Kalina cycles are used together. The Rankine cycle utilizes the system's primary heat source, whereas the Kalina cycle enhances overall efficiency by recovering the waste heat generated in the Rankine process. The electrical energy generated by the system is utilized for water electrolysis, thereby demonstrating the system's potential for hydrogen production. The entire system is comprehensively evaluated using energy, exergy, environment, economy, exergoeconomic, exergoenvironmental, enviroeconomic, energoeconomic, and energoenvironmental analyses (9E analysis method). The proposed hybrid system demonstrates an energy efficiency of 20.52 % and an exergy efficiency of 22.53 %. The hydrogen production mass flow rate is calculated as 0.05386 kg/s. The levelized cost of energy (LCOE) for the hybrid system was calculated as 0.1133 /kg H2. Based on energy-economic and exergy-economic evaluations, the specific costs of energy and exergy losses in the system are determined as 0.2099 Wh/, respectively. The energoeconomic environmental cost and the exergyeconomic environmental cost are found to be 68.79 /year, respectively. According to the environmental analysis, the system enables 22,283 tCO2/year of avoided emissions and yields a sustainability index of 1.291
Machine learning and design of experiment for enhanced biomass using N2 and CO2-enriched biochar at different pyrolysis temperatures
No full textThis study presents the impact of five different biochars prepared at different pyrolysis temperatures, enriched with nitrogen and carbon dioxide as a precursor. The study was developed by utilizing design of experiment (DOE) for response surface methodology (RSM). Different concentrations of biochar were added to the liquid culture medium for in vitro regeneration of Ceratophyllum demersum, which revealed the better performance of biochar prepared at low temperatures on plant biomass and pigmentation. Results analyzed by correlation analysis exhibited a significantly negative impact of biochar concentration and type on plant biomass and biochemical parameters, underscoring the intricate relationship within plant antioxidative mechanisms and growth response. Different machine learning (ML) models namely Random Forest (RF), Multi-Layer Perceptron (MLP), Gaussian Process Regression (GPR), Extreme Gradient Boosting (EXGB), CatBoost Regressor (CBR), and LightGBM Regressor (LGBMR) were employed for predictive accuracy and robustness using the coefficient of determination (R2) and Mean Squared Error (MSE). Results indicated that RF, XGB, and CBR consistently achieved superior predictive performance for chlorophyll-a (Chl-a), chlorophyll-b (Chl-b), and total chlorophyll (Chl-T), tannic acid (TA), with high R2 and low MSE values. The RF model used for the Y-Permutation test, feature importance test, and SHAP test confirmed the predictive performance. Feature importance test figured out concentration, while SHAP analysis illustrated biochar type as the most significant factor despite close scores. These insights may help to formulate next-generation biochar production for sustainable crop production and wastewater-based plant systems under climate stress conditions
Whose Voices Shape Türkiye’s Nuclear Discourse? A Social Media Sentiment Study of Digital Environmental Activism
No full textImage processing–assisted evaluation of yeast-encapsulated clove formulations against tomato brown rugose fruit virus
No full textSağlık Turizminde İnovatif Ürünler Olarak Shinrin-Yoku ve Shinrin-Ryohonun Değerlendirilmesi
No full textİnsanlaryüzyıllardır ormanların sessiz atmosferi, güzel manzarası, ılıman iklimi, hoşkokuları ve temiz havası sebebiyle ormanda gezinmekten hem büyük keyif almaktahem de fiziksel ve ruhsal bir dinlenme yaşamaktadır. İnsanlar günümüzde modernşehirlerde yaşamanın ve elektronik cihazlarla kuşatılmanın bir sonucu olarakfiziksel ve ruhsal sağlık sorunları yaşayabilmekte ve bundan şikâyetedebilmektedirler. Bunun yanında insanlar iş hayatında genellikle artan iş yüküve zihinsel stresle de karşı karşıya kalmaktadır. Doğaya dönmek, doğa ile başbaşa kalmak bu sorunları azaltmanın en etkili yoludur. Nitekim toplumda ormanve doğal ortamların iyileştirici etkilerine yönelik ilgi giderek artmaktadır.Shinrin-yoku veya orman banyosu, kişinin kendini doğaya bırakmasını ve bilinçlibir şekilde doğayla temasa geçmesini içeren geleneksel bir Japon uygulamasıdır.Shinrin-yoku, ormanda düzenli ve yormayan bir tempoda yürüyüş yapmayı, yolboyunca mola verip dinlenmeyi, nefes egzersizleri yapmayı ve çevredeki doğalortamı düşünmeyi içeren geleneksel bir rehabilitasyon uygulamasıdır. Shinrin-ryoho veya orman terapisiise, orman banyosuna göre daha odaklı bir iyileştirme amacına sahiptir. Belirlibireysel sağlık sorunlarını tedavi etmeye odaklanır ve yalnızca sertifikalı birshinrin-ryoho rehberi ve öğretmeniyle yapılabilmektedir. Shinrin-ryoho, temelduyular olan görme, işitme, tatma, koklama ve dokunma yoluyla ormanla bilinçlibir etkileşime geçme şeklinde açıklanmaktadır. Japonların shinrin-yokuuygulaması, sadece yeni bir sağlıklı yaşam trendi olmakla kalmamış, aynızamanda sağlık turizmi kapsamında sürükleyici turistik deneyimler için de büyükbir potansiyel sunmuştur. Günümüzde turistler, fiziksel ve ruhsal sağlıklarınıiyileştirmeyi amaçlayan ürünler, hizmetler ve deneyimler aramaktadırlar.Shinrin-yoku ve shinrin-ryohonun yenilikçi tedavi programları wellnessturizminde popüler ürünler olmaya başlamıştır. Bu çalışmanın temel amacı,ormanlar açısından çok büyük imkânlara sahip olan Türkiye’de shinrin-yoku veshinrin-ryoho konusunda farkındalığı arttırmak, uluslararası literatürde yeralan ikincil verilere dayalı olarak konuyla ilgili ulusal literatüre katkısağlamaktır. Bu amaç doğrultusunda çalışmada öncelikle sağlık turizmi ilewellness turizmi olguları açıklanmakta, ardından inovatif ürünler olarakshinrin-yoku ve shinrin-ryoho kavramları, içeriği, tarihi ve gelişimiirdelenmektedir. Shinrin-yoko ve shinrin-ryohonun insan sağlığı açısındanfaydaları bu konuda yapılmış araştırmaların bulgularına dayalı olaraksunulmaktadır. Sonuç bölümünde Türkiye özelinde konuyla ilgili değerlendirmeleryapılmaktadır.For centuries, people have greatly enjoyed walking inforests because of their quiet atmosphere, beautiful scenery, mild climate,pleasant scents, and clean air, and they experience physical and mentalrelaxation. People living in modern cities and surrounded by electronic devicescan experience physical and mental health problems and complain about theseproblems. In addition, people recently face increasing workloads and mentalstress in their worklife. Returning to nature and spending time in nature is themost effective way to reduce these problems. Indeed, interest in the healingeffects of forests and natural environments is increasing in society.Shinrin-yoku or forest bathing, is a traditional Japanese practice thatinvolves immersing oneself in nature and consciously engaging with it.Shinrin-yoku is a traditional rehabilitation practice that involves walking inthe forest at a regular, non-strenuous pace, taking breaks to rest along theway, practicing breathing exercises, and contemplating the surrounding naturalenvironment. Shinrin-ryoho or forest therapy, has a more focused healingpurpose than forest bathing. It focuses on treating specific individual healthproblems and can only be performed with a certified shinrin-ryoho guide orteacher. Shinrin-ryoho is described as a conscious interaction with the forestthrough the basic senses of sight, hearing, taste, smell, and touch. TheJapanese practice of shinrin-yoku has not only become a new wellness trend butalso offers great potential for immersive tourist experiences within the scopeof health tourism. Today, tourists seek products, services, and experiencesaimed at improving their physical and mental health. Innovative treatmentprograms in shinrin-yoku andshinrin-ryoho have begun to become popular products in wellness tourism. The main aimof the study is to raise awareness about shinrin-yokuand shinrin-ryoho in Türkiye that a country with vast forest resources, and to contributeto the national literature on the subject based on secondary data found ininternational literature. For this aim, the study first explains the conceptsof health tourism and wellness tourism, then examines the concepts, content,history, and development of shinrin-yokuand shinrin-ryoho as innovative products. The benefits of shinrin-yoku and shinrin-ryoho for human health arepresented based on the findings of previous researches conducted in this area.The conclusion section includes assessments of the issue specifically in thecontext of Türkiye.</p
